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Figure 61 - Information box with results of the ‘Calculate Volume’ operation
The main result is the net volume, but some additional numbers and
parameters are also shown:
•Vol -14508,1 m3: the net volume to be added (if positive) or removed (if negative) to convert the current terrain into the reference surface
•+17,5 m3: the positive volume volume between the terrain and the reference
surface, representing the volume that needs to be added to rise the terrain
towards the reference surface
•-14525,6 m3: the negative volume between the terrain and the reference surface, representing the volume that needs to be taken away to lower the terrain
towards the reference surface
•Ref terrain: the reference surface that was chosen, being the mean value of
the terrain for that particular polygon (‘ Ref terrain’) or an elevation value specified by the user (e.g. ‘Ref 180,0 m’)
•Sd 0,05 m: the sampling distance for the volume calculations, which can be
changed as explained in the section about the Virtual Surveyor Tools Settings.
Additional information about the information box can be found in the information
box section.
It is possible to select multiple polygons and calculate the volume for all of
them at the same time. You can see the results for each individual polygon when
you selected the polygon in the 3D viewport or the project tree. The volume will be
displayed in the information box.
7.8.2 Calculate volume difference
The Volume Difference function allows to calculate the volume difference between
two elevation terrain layers.
Multiple elevation layers
At least an additional elevation layer in the terrain format (.mpt) should be present in
a project in order to perform a volume difference operation. See the Adding an elevation layer section in order to learn how to add an additional elevation layer.
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